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| Commodity | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 |
| Manganese dioxide | $2,708,561 | $3,091,954 | $4,604,846 | $3,811,715 | $3,200,559 | $3,429,480 | $3,666,639 |
| Manganese oxides other than manganese dioxide | $3,870,200 | $4,423,899 | $4,247,748 | $5,471,084 | $5,219,242 | $6,644,101 | $7,899,472 |
| Total | $6,578,761 | $7,515,853 | $8,852,594 | $9,282,799 | $8,419,801 | $10,073,581 | $11,566,111 |
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